Osisko’s Gaspé Copper revamp: capex, deep resource and schedule lens for engineers
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
Osisko Metals is advancing a multi‑billion‑dollar restart of Quebec’s Gaspé Copper mine, which currently hosts 824 million indicated tonnes at 0.27% Cu and 670 million inferred tonnes at 0.30% Cu, with initial capex last pegged at about C$1.8 billion and a targeted 30–40‑year mine life. Recent focus on the deep Porphyry Mountain zone includes historical intercepts such as 852 metres at 0.65% Cu and 2.89 g/t Ag from 998 metres and 499 metres at 0.78% Cu from 1,212 metres, remaining open at depths beyond 1,700 metres. Management is aiming for permits and construction in the early 2030s, expects higher updated capital costs, and is seeking streamlined federal–provincial environmental approvals and a future development partner.
Technical Brief
- Management explicitly compares Gaspé’s scale and development trajectory to Canadian Malartic, targeting another “generational” asset.
Our Take
Osisko Metals’ later C$32.5 million private placement for the Gaspé copper project, noted in our database, signals that the initial C$200 million exploration spend is being supplemented by more targeted financing as the project moves from resource definition towards development decisions.
With Gaspé Copper sitting in Quebec, the project is competing for a slice of the C$72.4 billion in planned Canadian critical-minerals-related projects referenced in our coverage, which may influence how aggressively Ottawa and Quebec position fiscal and infrastructure support for a long-life copper asset.
The combination of a 30–40 year mine life and a required copper price of US$4/lb places Gaspé Copper in the mid-cost band of copper projects in our database, suggesting that execution discipline on the C$1.8 billion initial capex will be critical if prices retreat from the US$5–6/lb range cited in the article.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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